Looks okay, I don’t know about the size of the axle nub, @MarkD help us out?
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- Too much overall weight
- Moment of inertia is really low considering the weight. not an efficient use of material
- Diameter (based on your bearing post being standard for a C bearing) is a bit small
- It fits a 20mm axle, which is cool!
Converting it from sketch to CAD doesn’t take too long - I’d recommend trying it out yourself!
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Anyone here use onshape?
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I updated the profile cuz I decided mean for the edge of the rim to be poking inward. I also went through and adde fillets to everything
this also made the weight more normal
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Looking better!
Hi,
I recently got into yoyo design and learned Fusion 360 this week. I’ve got a design I’m pretty happy with, but feedback would be appreciated!
Specs:
Width: 46.38 mm
Diameter: 55.179 mm
Weight: 64.64
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Interesting shape. Well done!
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thanks! 
I think that 1st/2nd rim area is going to be tricky to cut on a lathe. There’s a small undercut in that little area, you should try to avoid undercuts like that where it’ll be hard for the tool to fit.
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How do you know that’s the actual weight of the yoyo? Using the yoyos volume and aluminums density?
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You can check the mass of the half of the yoyo by applying the density of the material you’re using, then checking it’s mass in it’s properties.
@MarkD helped me out with a post on https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/309
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Looking at the render, I’m considering a 2nd ring between the outer rim and the first ring, it feels like that empty space should be filled with something. If anyone knows how that would affect performance, let me know!
I like the shape. Looks like the weight distribution is maybe too even, or at least that weight distribution seems a bit at odds with that shape?
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What’s the purpose of that undercut? I don’t think you should have one between the two rims at all. Think of a cutting tool approaching the bar stock from the right - make sure it’s easy for the the machinist to set it up!
Also, a couple other issues I spotted:
- There is a sharp cut where the flatter part of the profile meets the more angled part
- There’s a discontinuity near the R1.303 fillet, this is not machinable
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Can you give an example of a ring without an undercut? and thanks! I’ll go through and fix those issues
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Yeahhhh I’ll get rid of the undercut, I don’t really do thumb grinds so I can smooth it out
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